: Many academic publishers use numeric identifiers for supplementary video files. For example, similar ID strings appear in PMC (PubMed Central) as metadata for supplementary MP4 movies attached to medical or biological research papers.
Related * ID: 14851. GEMx Illustrations. * ID: 14728. B-Roll. Geological Earth Mapping Experiment (GEMx) B-roll. NASA Scientific Visualization Studio [youtube] howto combine format parameters? #15381 - GitHub 14851(1)mp4
Depending on the context, it typically relates to one of the following: : Many academic publishers use numeric identifiers for
: The (1) in the filename often indicates a duplicate download or a second version of a file named 14851.mp4 saved in the same directory. This is common when using download managers or video tools like yt-dlp . NASA SVS | GEMx Animations 14851(1)mp4